Personally I don't see how Kuroto becoming Another OOO doesn't make sense.

His whole thing was being a ruler -- Or in his words, a god. His whole character revolves around his massive superiority complex. If anyone should be given the power of a king (Remember, the original OOO was an all-powerful king with the Greeed under his command), it should be Kuroto.

To add to that, it would've been a waste for them to not get Kuroto to become Another Rider after Ex-Aid got erased from history. His sheer determination in fucking over who stands in his way was a perfect for their king.